I think I figured out the oil leak

When I bought the bike the PO said there was a small oil leak. Drained the oil this morning and I think I found the problem. Yup a stripped oil pan.

 

Either get a heli-coil or replace pan ( I would opt for replacement -less chance of metal particles getting into sump if you try replacing without pulling.)

 

I recommend replacing the pan. There are plenty you can find on E-bay etc. Perhaps someone on this site might have a extra one they are willing to part with. If you do replace, remember to replace the o-ring on the oil level sensor when you swap the sensor into the new pan.

 

^+1

 

Pulling the pan now. $40 shipped isn't bad at all

 

So uh is this bad or am I over reacting?

 

On one of the headers, it looks like someone tried to TIG a bolt back onto the block. :/

 

A piggyback drain plug costs about $6 and takes 5 minutes to install. Any good autoparts store will have them on the shelf.

 

Take a photo. Hopefully it's just slag/ melting from removing a broken stud. Steel and aluminum don't weld (well they can, but not without some expensive filler).

 

What is a piggy bank drain plug ,? I'm curious!
Alan

 

It's a self-tapping plug that threads into a stripped hole, and has another smaller plug in it. The piggyback gets threaded in, and is usually sealed with threadlocking compound so it can't come back out. Then the smaller plug is used to drain the sump. There are also oversize drain plugs available, but there may be clearance issues with an oversize plug since the drain hole is recessed.

 

Sorry for the late reply I work nights and didn't see this until now. I tried an oversized plug and the darn thing wouldn't thread in. I tried tapping to a 5/8 inch bolt and still wouldno tap. :/

As for the header looks like my photo didn't upload. Don't worry about the break in the exhaust I'll fix that before I ride it again.

 

Sorry for the multiple pictures. Still trying to figure the forum out

 

That stud is fubard.

The easy, but slow, method to remove the reminant is to make a dam/cup with modeling clay on the head so liquid can stay in contact woth the stud remnant. Mix alum (from the gorcery store) in warm water. The alum solution will dissolve the steel over the course of a few days, leaving the aluminum threads undamaged.


It looks like someone has been inside of that engine. Yamaha did not use orange RTV during assembly.

 

Thanks I'll try that soon.

 

So I received my new oil pan, just waiting for the gaskets from Len. I might have found the cause. The plug on the right is from the new pan. I don't have a caliper but it appears that the left one, the one that my bike came with, is already an oversized plug.

 

Um....ya. Dang.

 

looks just like the cut off bolt i used as a plug on my old honda....

 

P.O. unless it is someone you know well, never believe them my favorite "well maintained" = dumped some oil in it . "Carbs professionally cleaned"= used some spray cleaner on the outside of carbs . "Noise will go away once it warms up" =the motor Honey takes up all the clearance . Man that is a bad deal on the stud agree try K-Moe's
method before trying anything else. Good luck

 

a $500 bike i knew there would be issues. But why would over tighten a drain plug multiple times on different plugs? and what is the deal with trying to weld that header stud back on? wouldn't it be easier to get a new stud?